Hi firefly9000
In short:-
XP SP2 X32 = very good
Vista SP0 X64 = bad
Vista SP1 X64 = bad
Vista SP2 X64 = great
Windows 7 SP0 X64 = great
Windows 7 SP1 X64 = great
Based on my personal testing with the Consumer Preview and testing with X1d and S1V2, CW's testing and reported results, and other users experieicne across a myriad of Audio Forums,
Windows 8 X64 is without doubt the best DAW audio O/S so far. Even compared to the latest MAC o/s
Win 8 X64 is light-years ahead in terms of very-high-CPU-load-ultra-low-latency DAW work.
There is of course a
but ....
All of the above is correct
provided you have [ at least ] and audio card and video card with up-to-date Windows 7 X64 drivers or Windows 8 X64 drivers.
The days of the operating system being any sort of blocker or hinderance or "limiter" to what can be done in-the-box are long gone.
Tim